JP2001109054A - Camera - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a camera which can warn that a blurring photograph is taken because a camera is moved though a shutter is opened even in the case of the long-time shutter speed of a night photographing time when a silence means effectively functions. SOLUTION: A microcomputer for control 101 and a sounding body driving circuit 102 make a buzzer 103 sound and stop the sounding thereof. A shutter control circuit 104 controls the shutter 105. An LED for AF display 111 is set for informing a photographer of the finish of range-finding and the failure thereof. An LED for LLT display 113 is made to flicker or turned on when low luminance is judged by the microcomputer 101. A change-over switch SW3 is set for executing the ON/OFF of the output of the buzzer 103. Then, when silence is selected by the switch SW3, it is displayed to be warned by using the LEDs 111 and 113 that the shutter is opened.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a camera having a warning display device for giving a warning when a shutter of a camera is in the middle of opening or a trouble.

[0002]

2. Description of the Related Art A conventional camera warning display is disclosed in
As shown in US Pat. No. 138457, a buzzer sound is issued for a bright subject to be subjected to a high-luminance warning, and a dark subject to be subjected to a low-luminance warning,
There is a method in which the display of a TV value or an AV value of a liquid crystal device in a finder is blinked. In addition, Tokiko 7-283
As shown in Japanese Patent No. 87, there is a video camera with a still camera provided with a pseudo shutter sound generating section that records a pseudo shutter sound in the video camera section when the shutter of the still camera is released.

[0003]

However, in the above-mentioned conventional example, the former (Japanese Patent Laid-Open No. Hei 9-138457) is used.
For example, if the warning is given by the buzzer sound depending on the level of the brightness, or if the LCD display in the viewfinder blinks, the buzzer sound is turned on and off by the photographer. Does not have means for switching, and does not give a warning during shutter opening / closing.

As in the latter case (Japanese Patent Publication No. Hei 7-28387), a video camera with a still camera records a pseudo shutter sound, and the pseudo shutter sound generation unit stores the pseudo shutter sound in an oscillation circuit, RAM, or ROM. Only being
It is not intended to warn the operator.

An object of the present invention is to make sure that the shutter is open to the photographer even when the silencing means is functioning effectively and at a long shutter speed such as slow synchro photography or night view photography. An object of the present invention is to provide a camera capable of preventing a blurred photograph caused by moving the camera in spite of the shutter being opened by notifying the user.

When the silencing means is functioning effectively, an abnormal operation or an error state is detected by blinking or lighting a display LED or the like, and a warning is issued in a quiet place. Suitable for.

[0007]

SUMMARY OF THE INVENTION In order to achieve the above object, the invention according to claim 1 of the present application generates a predetermined pseudo shutter sound in synchronization with opening and closing of a shutter, performs abnormal operation of a camera, It comprises a sounding body that detects an error and outputs a predetermined warning sound, and further comprises a silencer for inhibiting the sounding body from producing a sound, and only when the silencer is functioning effectively, A camera having a warning display device for indicating that the shutter is open by continuously lighting or blinking a display device provided for a different purpose from the start of opening the shutter until the shutter is completely closed. It is in.

With this configuration, it is possible to notify the photographer that the shutter is open, thereby preventing a blurred photograph caused by moving the camera despite the shutter being open. be able to.

The invention according to claim 2 of the present application has a different object by detecting an abnormal operation or an error state only when the silencer is functioning effectively in the camera according to claim 1. The present invention provides a camera characterized in that the plurality of display devices provided in (1) and (2) are used in combination, and these display devices are turned on or off continuously.

[0010] With this configuration, when an abnormal operation or an error state is detected while the sounding body is not sounding, a display device such as an LED blinks or lights continuously to open the shutter to the photographer. Can be notified.

According to a third aspect of the present invention, in the camera according to the first or second aspect, the display device provided for a different purpose includes an AF display LED indicating that the distance measurement by the autofocus system is completed. , A low-luminance warning L for warning that the brightness of the subject is below a predetermined value.
The camera is an ED or the like.

According to this configuration, it is most suitable for warning in a quiet place.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a first embodiment of the present invention will be described in detail. FIG. 1 is a block diagram showing a circuit configuration of the camera according to the first embodiment of the present invention. In FIG. 1, reference numeral 101 denotes a control microcomputer (hereinafter, referred to as a “microcomputer”) that performs arithmetic and sequence control of a camera. Reference numeral 102 denotes a sounding body drive circuit which outputs a buzzer 103 based on a signal sent from the microcomputer 101.
Is generated in various patterns or is stopped. 104 is a shutter control circuit for the microcomputer 1
The shutter 105 is controlled in accordance with the control signal 01.
A photometry circuit 106 performs photometry of a subject, and
The photometric output is sent to the microcomputer 101 under the control of 1. Then, the microcomputer 101 performs A / D conversion on the sent photometric output, and uses it for calculation of exposure conditions (aperture, shutter speed).

Reference numeral 107 denotes a distance measuring circuit for performing focus detection, which includes a sensor (not shown) for performing AF and a circuit for reading the AF, and is controlled by the microcomputer 101. Then, the microcomputer 101 measures the distance based on the A / D conversion value of the sensor output. A feeding circuit 108 controls a feeding motor (not shown), and feeds (winds up and rewinds) the film in accordance with a control signal from the microcomputer 101. 109
Is a lens driving circuit including a motor for moving the taking lens according to the result of the distance measuring circuit 107. Reference numeral 110 denotes a limiting resistor for limiting the current of the display LED.
1 is A for notifying the photographer of the completion of ranging or the failure of ranging.
This is an F display LED. Reference numeral 112 denotes a limiting resistor for limiting the current of the display LED.
16 is an LLT display LED that blinks or turns on when the microcomputer 101 determines that the luminance is low based on the output of 16.

SW1 and SW2 are switches interlocked with the release button. The switch SW1 is turned on when it is pushed down to the first stroke, and a shooting preparation operation such as AF or photometric calculation is started. The camera of this embodiment has two release buttons.
The switch SW1 is configured by pressing the first stage, and the switch S is configured by pressing the second stage.
W2 is turned on. SW3 turns on the output of the buzzer 103 driven by the sounding body drive circuit 102
A switch for performing / OFF.

FIG. 2 is a diagram showing a timing chart of the camera according to the first embodiment of the present invention. Buzzer 1 for silencing the warning sound provided solely on the camera
03 ON / OFF switch SW3 is turned on by the photographer
This shows the case where the state is set to the F state. First, when SW1 which is the first stroke of the release button is pressed, and then SW2 which is the second stroke is pressed, the photographing operation of the camera is started. When the shutter operates from closed to open in a series of photographing operation sequences, the display LEDs 111 and 1
13 blinks in the section from shutter opening to closing. The blinking of the display LED informs the photographer that the shutter is open when the warning sound is muted.

FIG. 3 is a flowchart of the camera according to the first embodiment of the present invention. In the following flow, each step is abbreviated as “S”. In FIG. 3, first, a buzzer ON / OFF switch SW3 is turned on to mute a warning sound provided solely in the camera.
The / OFF state is determined (S301). Here, if it is in the ON state (S302), no warning is given by the buzzer.
Next, the state of the release button SW1 is determined. If the release button SW1 is ON (S303), photometry is performed (S304), distance measurement is started (S305), and the photographing lens is driven based on the distance measurement information (S305). S306). Next, release button SW2
Is turned on, and when the microcomputer 101 recognizes it, a shutter opening operation as an exposure operation is performed (S308), and the LED-LLT 113 and the LED-AF 111, which are display LEDs, are notified to notify the photographer that the shutter is open. It blinks (S309). When the shutter is closed (S31
0), the blinking of the display LEDs 111 and 113 ends, and a series of release operations for winding the film ends (S311).

The above is a flowchart when the silencer is ON. Similarly, when the silencer is OFF (S31).
2) will be described below. The state of the release button SW1 is determined. If the release button SW1 is ON (S313), photometry is performed (S314), distance measurement is started (S315), and the photographing lens is driven based on the distance measurement information (S31).
6). When the release button SW2 is turned on and the Myco 101 recognizes it, the shutter opening operation, which is an exposure operation, is performed (S318).
Is performed, and a pseudo shutter sound is sounded by the buzzer 103 to notify the photographer that the shutter is open (S319). Subsequently, the shutter closes (S320),
A series of release operations for winding the film are completed (S311).

Next, a second embodiment of the present invention will be described. When the silencer is not functioning effectively (that is, invalid), when the microcomputer 101 detects an abnormal operation of the camera or an error, the buzzer 103 as a sounding body sounds and a warning is issued. In such a camera, when the aforementioned silencer is functioning effectively, that is, when the buzzer 103, which is a sounding body, is in a state in which sound cannot be sounded,
When the microcomputer 101 detects an abnormal operation or an error state,
The LED for AF display and the LED for low-luminance warning are blinked or turned on. The blinking cycle in this case is different from that of the first embodiment.

The above is the correspondence between each configuration of the present invention and the embodiment. However, the present invention is not limited to the configuration of the embodiment, and the functions described in each claim or
It goes without saying that any configuration may be used as long as the function of the configuration of the embodiment can be achieved.

[0021]

As described above, according to the invention described in the claims of the present application, a sounding body that outputs a predetermined warning sound and a pseudo shutter sound is provided. In order to notify that the shutter is open, the display LED blinks or lights up, even at long shutter speeds such as slow sync shooting or night view shooting,
It is possible to prevent a blurred photograph caused by moving the camera even when the shutter is open.

On the other hand, when the warning sound is OFF, the display LE
Blinking or lighting D is suitable for warning in a quiet place.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a circuit configuration of a camera according to a first embodiment of the present invention.

FIG. 2 is a timing chart of the camera according to the first embodiment of the present invention.

FIG. 3 is a flowchart of the camera according to the first embodiment of the present invention.

[Explanation of symbols]

 Reference Signs List 101 control microcomputer 102 sounding body drive circuit 103 buzzer 104 shutter control circuit 105 shutter 111 AF display LED 113 LLT display LED SW3 ON / OFF switch

Claims (3)

[Claims] 1. A sounding body which emits a predetermined pseudo shutter sound in synchronization with opening and closing of a shutter, or outputs a predetermined warning sound upon detecting an abnormal operation or error of a camera,
In addition, a silencer for inhibiting the sounding body from producing sound is provided, and only when the silencer is effectively functioning, is provided for a different purpose from the start of opening the shutter to the closing of the shutter. A camera having a warning display device that indicates that a shutter is open by continuously lighting or blinking a display device that is operating. 2. The camera according to claim 1, wherein a plurality of display devices provided for different purposes are used together by detecting an abnormal operation or an error state only when the silencing means is functioning effectively. A camera characterized by blinking or continuously lighting each of these display devices. 3. The camera according to claim 1, wherein the display device provided for a different purpose includes an AF display L indicating completion of distance measurement by an autofocus system.
A camera comprising an ED, a low-brightness warning LED for warning that the brightness of a subject is lower than a predetermined value, and the like.